Refresh Rate Test
Measure your display's refresh rate and frame timing directly in your browser.
Observed refresh rateReady
Observed refresh rate
— Hz
Starting measurement…
5-second test · auto-runs on load · keep this tab visible
Frame timing
Current FPS
···
Average FPS
···
Frame time
···
Consistency
—
- Measured frames
- ···
- Late callbacks
- ···
- Large gaps
- ···
Live frame-time graph
≤1.3×≤1.7×>1.7×
Green = normal · Amber = slow · Red = large gap
Motion test
Check whether motion looks smooth and consistent.
Browser-based measurement · Results can vary with system load, power saving, VRR and browser settings.
Guide
How to test
01
Close extra tabs
Close unnecessary tabs and apps to reduce load.
02
Go full screen
Press F to maximize the test area and keep it focused.
03
Start measurement
Run the 5-second measurement without moving the window.
04
Check result
Watch for stability and large frame gaps. Press F to exit.
How it works
Hz, FPS, and frame time
Hz (hertz)
The number of display refresh cycles per second. This test observes browser frame cadence as a proxy for the active display cadence.
FPS (frames per second)
The number of animation frames observed per second by the browser during the test.
Frame time
The time between two frames in milliseconds. 16.67 ms ≈ 60 Hz, 8.33 ms ≈ 120 Hz, 6.94 ms ≈ 144 Hz. Steady frame times mean stable motion.
How this test measures
The test collects browser frame timing timestamps for 5 seconds, skips the first warm-up frames, then computes average FPS from elapsed measurement time, plus median and average frame intervals, windowed min/max FPS, and late-frame counts. The primary result snaps to a nearby standard rate (60, 75, 90, 120, 144, 165, 240, and similar) while also showing the measured value such as ~143.8 Hz. When timing is too jittery, it reports “Measurement unstable” instead of forcing a rate. All measurement runs locally in your browser; nothing is sent to a server.
What is Refresh Rate Test?
A refresh rate test checks how many times your screen updates the image each second, shown as Hz. For example, 60Hz means 60 times per second. Higher numbers like 120Hz can look smoother. You just watch the numbers - the browser does not change your screen setting.
Setup checklist
If it reads 60 Hz, check this first
A high-refresh display often measures around 60 Hz for setup reasons, not hardware reasons. Work through these before trusting the number.
01
Operating-system setting
Many high-refresh screens default to 60 Hz. Open your OS display settings and switch the refresh rate to the maximum for that display.
02
Cable and port
Check that your cable, port, and display combination supports the resolution and refresh rate you selected.
03
Browser hardware acceleration
Browser rendering configuration can affect frame delivery. If results are unexpectedly low, check that hardware acceleration is enabled.
04
Power and visibility
Power saving can cap the frame rate, and a hidden or background tab gets throttled. Plug in power, keep this tab focused and visible, then retest in fullscreen.
Reference
Refresh rate standards
60 Hz · Standard
The baseline. Covers office work, browsing, and video, with one frame every 16.67 ms.
120 / 144 Hz · High refresh
The mainstream gaming and premium-display tier. Scrolling and motion look markedly smoother, with frames every 6.94–8.33 ms.
240 Hz and above
Frame interval: ~4.17 ms.
VRR · Variable
VRR can cause the observed frame cadence to vary instead of remaining fixed at one value. A changing result is therefore not necessarily a problem.
FAQ
Refresh Rate Test FAQ
01How do I check my monitor's refresh rate?
Run the refresh rate test and let it measure the browser's frame timing for several seconds.
02How do I know if my monitor is running at 144Hz?
Run the test and compare the observed frame rate with your monitor's configured refresh rate. A result around 144Hz suggests the browser is observing that frame cadence.
03Why does my 144Hz monitor show 60Hz?
Your operating-system display settings, cable, GPU output, monitor settings, browser behavior, or another part of the display chain may be limiting the observed rate.
04What is the difference between refresh rate and FPS?
Refresh rate is how often the display can refresh, while FPS describes how quickly frames are being produced or presented by software.
05Can this test measure my monitor's maximum refresh rate?
No. It checks the frame cadence observed by the browser under the current setup.
06Why does my refresh rate result change?
Browser load, power-saving settings, VRR, system load, throttling, and other factors can affect browser frame timing.